| Element | Symbol | Mean | Std. dev. | Minimum | Maximum |
|---|---|---|---|---|---|
| Aluminum | Al (wt%) | 4.626 | 0.737 | 3.729 | 6.837 |
| Arsenic | As (ppm) | 6.598 | 1.760 | 4.905 | 12.850 |
| Calcium | Ca (wt%) | 0.408 | 0.181 | 0.205 | 0.781 |
| Copper | Cu (ppm) | 13.866 | 2.702 | 8.212 | 22.556 |
| Iron | Fe (wt%) | 1.552 | 0.406 | 1.012 | 2.993 |
| Mercury | Hg (ppm) | 0.037 | 0.008 | 0.010 | 0.056 |
| Magnesium | Mg (wt%) | 0.314 | 0.143 | 0.169 | 0.756 |
| Manganese | Mn (ppm) | 549.816 | 129.749 | 254.483 | 914.126 |
| Sodium | Na (wt%) | 0.822 | 0.146 | 0.616 | 1.157 |
| Phosphorus | P (wt%) | 0.051 | 0.012 | 0.039 | 0.084 |
| Lead | Pb (ppm) | 15.270 | 2.583 | 11.009 | 25.770 |
| Selenium | Se (ppm) | 0.295 | 0.132 | 0.100 | 0.778 |
| Titanium | Ti (wt%) | 0.289 | 0.023 | 0.225 | 0.354 |
| Zinc | Zn (ppm) | 53.650 | 11.305 | 38.786 | 94.186 |